JP3136962U - Combustor agitator - Google Patents

Abstract

An object of the present invention is to appropriately remove combustibles and ash remaining in the vicinity of a rotating shaft of a motor, thereby improving agitation performance.
The drive means drives a stirring means arranged on the bottom side in the combustion chamber 21 of the combustor to stir and separate the combustion products and ash. The agitation means includes a pivot portion 30 fitted to the rotation shaft of the drive means, and a plurality of blades extending from the pivot portion 30 in the shape of a bar having a substantially square cross section. Each blade has upper and lower surfaces 311, 312 arranged in parallel with the bottom surface of the combustion chamber 21. Of the side surfaces, a part of the stirring surface 313 in the rotation direction is formed on the vertical surface from the upper surface side to the lower surface. A slope 314 that is gradually inclined toward the counter-rotating direction is formed.
[Selection] Figure 3

Description

  The present invention relates to a stirrer for a combustor, and more particularly, to a stirrer for a combustor that increases the combustion efficiency of a combustor by stirring and separating combustibles and ashes from the bottom of a combustion chamber of the combustor.

  FIG. 6 shows a stirrer for a combustor according to a conventional example (see, for example, Patent Document 1).

  In this fuel machine agitator, a propeller-like combustor agitator 133 that is rotationally driven by a motor 13 as a drive means is disposed immediately above the fire bed 12 of the combustion chamber 11. The combustion substance agitating device 133 can agitate the non-combustible combustion substance accumulated on the fire bed 12 of the combustion chamber 11 and the ash after burning to completely burn out.

  Further, a large number of through holes 121, 121, 121... Through which only ashes are allowed to pass are formed in the fire bed 12 of the combustion chamber 11. Further, an ash slag discharge port 111 for discharging ash slag that has passed through the through holes 121, 121, 121.

  The combustion substance agitator 133 rotates around the shaft 132 just above the fire bed 12 of the combustion chamber 11, agitates so that the ash can pass through the through holes 121, 121, 121. Is made to burn out as much as possible, and at the same time, the ash ash is easily discharged from the through holes 121, 121, 121.

Taiwan Utility Model No. 304647

  In the conventional combustor agitator, in order to smoothly rotate the combustor agitator 133, a slight gap must be formed between the combustor agitator 133 and the fire bed 12. However, ashes are likely to accumulate in the gap, and in particular, if the ashes remain in the vicinity of the rotating shaft 132 of the motor, the combustion agitator 133 is disturbed. And as a result of the combustion substance stirring apparatus 133 becoming unable to rotate smoothly, there exists a problem that stirring performance will fall. Another problem is that it is difficult to eliminate the ash accumulated in the vicinity of the rotating shaft 132 of the motor.

  Accordingly, an object of the present invention is to provide a stirrer for a combustor that can appropriately remove the combustion products and ash accumulated in the vicinity of the rotating shaft of the motor and improve the stirring performance.

As a means for solving the above problems, the present invention provides:
A stirrer for a combustor that drives a stirrer disposed on a bottom side in a combustion chamber of a combustor by a drive unit and stirs and separates combustion products and ash soot,
The stirring means includes
A pivot that fits with the rotating shaft of the drive means;
A plurality of blades extending from the pivotal support in the shape of a bar having a substantially rectangular cross section;
With
Each blade has an upper and lower surface arranged in parallel with the bottom surface of the combustion chamber, and gradually counters a vertical surface from the upper surface side to the lower surface of a part of the stirring surface in the rotational direction. A slope inclined to the rotation direction side is formed.

  In the combustion substance agitation apparatus, the agitation unit may be configured by extending two blades from the pivot part in a point-symmetric manner with the pivot part as a center.

  In the combustion substance agitating device, the inclined surface is preferably formed so that the width dimension gradually decreases toward the lower surface and terminates at the lower surface as it moves from the tip side of the blade toward the pivot portion side. .

  In the combustion substance agitating device, it is preferable that each of the blades is formed so that the width dimension of the upper and lower surfaces gradually becomes narrower from the pivot portion toward the tip.

  It is preferable that each of the blades bend gradually toward the rotational direction from the intermediate portion toward the tip, so that the intermediate portion from the pivot support portion and the tip from the intermediate portion form an obtuse angle.

  In the combustion substance agitation apparatus, it is preferable that a polygonal coupling hole is formed in the pivotal support portion, and the tip end portion of the rotation shaft of the driving means is fitted into the coupling hole to be integrated.

  According to the present invention, the slant formed on the blade can push out the ash accumulated between the combustion substance agitator and the bottom of the combustion chamber of the combustor more smoothly. It can discharge | emit through each through-hole formed in the fire bed of a combustion chamber, and it becomes possible to burn the remaining combustion thing reliably.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is a cross-sectional view of a main part of a combustor that employs the combustion material agitation apparatus according to the present embodiment. This combustor includes a combustion chamber 21 and a stirring device 3.

  A fire bed 22 is provided at the bottom of the combustion chamber 21, and a plurality of through holes 222, 222, 222. Each through hole is formed in a size that prevents passage of the combustion product and allows passage of the ash cake obtained as a result of the combustion of the combustion product.

  The stirring device 3 is accommodated on the bottom side in the combustion chamber 21. The agitator 3 is rotationally driven by a motor 24 that is a driving means disposed below the combustion chamber 21.

  The combustion substance stirring device 3 will be described in detail with reference to FIGS. 2 and 3. FIG. 2 is an exploded perspective view showing a state in which the combustion product stirring device 3 and the rotary shaft 23 are fitted, and FIG. 3 is a perspective view of the combustion product stirring device 3 as viewed from the fire bed 22 side. As shown in the figure, the combustion substance agitating device 3 includes a pivotal support portion 30 and a pair of blades 31, 31 extending from the pivotal support portion 30 in directions opposite to each other. The pivot 30 has a rectangular coupling hole 301 that fits with the rotary shaft 23 (in order to prevent relative rotation with the rotary shaft 23, it is necessary to form a polygon, but there is no particular limitation otherwise). Is formed. Each blade 31 is rod-shaped and has a substantially square cross section. Each blade 31 is formed so that the lateral width of the upper and lower surfaces gradually becomes narrower from the pivotal support 30 side toward the tip. Each blade is formed so that the blade gradually bends in the direction of rotation from the intermediate portion toward the tip, and the intermediate portion from the pivotal support portion 30 and the obtuse angle from the intermediate portion to the tip. On the surface of each blade 31, the combustibles and ashes are agitated corresponding to the lower surface 312 facing the fire bed 22 of the combustion chamber, the upper surface 311 on the opposite side, and the rotational direction of the rotary shaft 23 of the upper surface 311. A stirring surface 313 that extends substantially perpendicularly from the peripheral edge of one side to the lower surface 312 and is sandwiched by the upper surface 311 and the lower surface 312 from both sides and mainly stirs up the unburned combustion product, and the stirring surface 313 and the lower surface A slope 314 is formed by chamfering a part of the ridge angle with the 312.

  A back surface 315 substantially parallel to the stirring surface 313 is formed on the opposite side of the stirring surface 313 and the inclined surface 314. Furthermore, the ridgeline 31A between the inclined surface 314 and the stirring surface 313 and the ridgeline 31B between the inclined surface 314 and the lower surface 312 are formed so as to converge at one end from the pivot portion 30 of the blade 31. As a result, as shown in FIG. 4, the lateral width of the slope 314 gradually increases from one apex near the pivotal support 30 to the other end near the tip.

  FIG. 4 shows the state of use of the combustion product stirring device 3 of the present invention. As shown in the figure, according to this configuration, the combustion product stirring device 3 of the present invention corresponds to the rotation direction of the rotating shaft 23, By dividing the one surface for stirring the combustion product and ash residue into the stirring surface 313 and the inclined surface 314, the resistance force caused by the combustion product and ash residue can be reduced when stirring, and thus the smooth rotation of the combustion material stirring device 3 is promoted. be able to. Further, as shown in FIG. 5, the slope 314 formed obliquely can more reliably push the ash cake into the through holes 222, 222, 222... I can do it.

  In addition, when the combustion substance agitating device 3 is driven by the motor 24 and the rotating shaft 23 to rotate, the inclined surface 314 formed obliquely at an obtuse angle with the lower surface 312 uses the shape thereof, and is near the pivot portion 30. Since the ash scum accumulated in the two blades 31, 31 can be pushed out near the tip of the two blades 31, 31, the problem of insufficient stirring effect near the pivotal support 30 can be solved.

  Further, since one surface of the two blades 31 and 31 for stirring the combusted matter and the ash soot is bent so as to be recessed, the stirring effect can be more reliably exhibited so as not to let the combusted product and the ash soot escape.

  The combustion substance stirring device of the present invention can be used for various combustion devices with a combustion chamber. In particular, the present invention can be applied to a combustion apparatus that generates energy by burning a grain shell.

The principal part sectional drawing of the combustor using the combustion material stirring apparatus of this invention. The disassembled perspective view which shows the fitting state of the combustion substance stirring apparatus and a rotating shaft. The perspective view seen from the fire bed side of the combustion substance stirring apparatus. Explanatory drawing which shows the use condition of the combustion substance stirring apparatus. Explanatory drawing which shows the effect of the slope formed in the combustion substance stirring apparatus. The principal part sectional drawing of the combustor which shows an example of the conventional stirring apparatus for combustors.

Explanation of symbols

21 Combustion chamber 22 Firebed 222 Through-hole 23 Rotating shaft 24 Motor 3 Combustion product agitating device 30 Pivoting portion 301 Joint hole 31 Blade 311 Upper surface 312 Lower surface 313 Stirring surface 314 Slope 315 Rear surface 31A, 31B Ridge line

Claims (6)

A stirrer for a combustor that drives a stirrer disposed on a bottom side in a combustion chamber of a combustor by a drive unit and stirs and separates combustion products and ash soot,
The stirring means includes
A pivot that fits with the rotating shaft of the drive means;
A plurality of blades extending from the pivotal support in the shape of a bar having a substantially rectangular cross section;
With
Each blade has an upper and lower surface arranged in parallel with the bottom surface of the combustion chamber, and gradually counters a vertical surface from the upper surface side to the lower surface of a part of the stirring surface in the rotational direction. A stirrer for a combustor, characterized in that a slope inclined to the rotational direction side is formed.   2. The stirring device for a combustor according to claim 1, wherein the stirring unit is configured by extending two blades from the pivot portion in a point-symmetric manner with the pivot portion as a center.   The slope is formed so that the width dimension gradually decreases toward the lower surface and terminates at the lower surface as it goes from the tip side of the blade toward the pivot portion. The stirrer for a combustor described in 1.   4. The combustor according to claim 1, wherein each of the blades is formed so that a width dimension of an upper surface and a lower surface is gradually narrowed from the pivot portion toward a tip. 5. Stirring device.   Each of the blades is gradually bent from the intermediate portion toward the tip, and is bent toward the rotational direction side, and is formed such that the intermediate portion from the pivot support portion and the tip from the intermediate portion form an obtuse angle. The stirrer for a combustor according to any one of claims 1 to 4.   6. The system according to claim 1, wherein a polygonal coupling hole is formed in the pivotal support portion, and the tip end portion of the rotation shaft of the driving means is integrated with the coupling hole. The stirrer for a combustor described in 1.

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